Japanese inventor Shota Ishiwatari believes he has made that possible with "Tailly," a robotic tail that reacts with the wearer’s heart rate, wagging rapidly when the owner is excited and it simply hangs down when the human has a normal heartbeat, Geobeats reported.

Ishiwatari, who is currently trying to get $100,000 in funding for the technological tail after a failed drive on Kickstarter, insists the Tailly is not a mere toy, a fashion accessory or a gadget. It's actually all three combined into one amazing device.